tweak use of 'dropins'

releng.wtpbuilder/scripts/dependency/dependency.xml

@@ -396,8 +396,8 @@
        <echo message="dropinsFolder: ${dropinsFolder} " />
         <condition
             property="install.destination"
-            value="${base.install.dir}"
-            else="${base.install.dir}${dropinsFolder}/${groupId}">
+            value="${base.install.dir}${dropinsFolder}/${groupId}"
+            else="${base.install.dir}">
             <isset
                 property="dropinsFolder"/>
         </condition>